CVE-2022-21971
HighExploitedPublic exploitWindows Runtime Remote Code Execution Vulnerability
Published Feb 9, 2022 · Updated Oct 30, 2025
Key Facts
Patch immediately- CVE-2022-21971 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 10 1809 (Microsoft), Windows 10 1909 (Microsoft), Windows 10 20h2 (Microsoft) and 14 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 18, 2022. Public exploit code is available.
- EPSS estimates a 54% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows 10 1809 10.0.17763.2565, Windows 10 1909 10.0.18363.2094, Windows 10 20h2 10.0.19042.1526.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
54%
Higher than 98.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-21971 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Windows Runtime Remote Code Execution Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Aug 18, 2022 | Sep 8, 2022 | Not reported |
| Industry KEV feed | Aug 18, 2022 | Sep 8, 2022 | Not reported |
| CIRCL KEV | Aug 18, 2022 | Sep 8, 2022 | Not reported |
| ENISA EUVD | Aug 18, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
19 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1809Microsoft | See advisory | 10.0.17763.2565 |
| Windows 10 1909Microsoft | See advisory | 10.0.18363.2094 |
| Windows 10 20h2Microsoft | See advisory | 10.0.19042.1526 |
| Windows 10 21h1Microsoft | See advisory | 10.0.19043.1526 |
| Windows 10 21h2Microsoft | See advisory | 10.0.19044.1526 |
Patched Releases
Windows 10 1809
10.0.17763.2565
Windows 10 1909
10.0.18363.2094
Windows 10 20h2
10.0.19042.1526
Windows 10 21h1
10.0.19043.1526
Windows 10 21h2
10.0.19044.1526
Windows 11 21h2
10.0.22000.493
Windows Server 2019
10.0.17763.2565
Windows Server 2022
10.0.20348.524
Windows Server 20h2
10.0.19042.1526
Windows 10 Version 1809
10.0.17763.2565
Windows 10 Version 1909
10.0.18363.2094
Windows 10 Version 20H2
10.0.19042.1526
Windows 10 Version 21H1
10.0.19043.1526
Windows 10 Version 21H2
10.0.19044.1526
Windows 11 version 21H2
10.0.22000.493
Windows Server 2019 (Server Core installation)
10.0.17763.2565
Windows Server version 20H2
10.0.19042.1526
Timeline
Publicly disclosed
Feb 9, 2022
Added to CISA KEV
Aug 18, 2022
Added to Industry KEV feed
Aug 18, 2022
Added to CIRCL KEV
Aug 18, 2022
Added to ENISA EUVD
Aug 18, 2022
Last updated
Oct 30, 2025
Weakness Type
- CWE-824 Access of Uninitialized Pointer
References
FAQ
Common Questions.
Windows Runtime Remote Code Execution Vulnerability
Affected: Windows 10 1809 (Microsoft); Windows 10 1909 (Microsoft); Windows 10 20h2 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 18, 2022.
Yes. It was added on Aug 18, 2022 with a federal remediation due date of Sep 8, 2022.
Public exploit code is available.
Fixed versions are available, including Windows 10 1809 10.0.17763.2565, Windows 10 1909 10.0.18363.2094, Windows 10 20h2 10.0.19042.1526.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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